Sliding mode control for an induction machine submitted to large variations of mechanical configuration

Abstract

In this paper, a variable structure control (VSC) algorithm with a time-varying switching surface is combined with an indirect field-oriented control in order to control the position of an induction machine shaft submitted to large variations of mechanical configuration such as inertia or load torque changes. The introduction of a time-varying switching surface guarantees the existence of a sliding mode since the beginning of the shaft motion without any chattering effects. Indeed, this moving switching surface allows the reaching phase elimination and the motor behaviour is insensitive to unknown mechanical configuration changes. The algorithm has been first tested in simulation and then implemented using a low-cost DSP platform combined with a numerical coprocessor. Finally, an advanced test bed is used in order to evaluate the tracking properties and the robustness capacities of the VSC law with variations of the mechanical configuration.

A Novel Self-Tuning Fuzzy Logic Controller Based Induction Motor Drive System: An Experimental Approach

“…The output performance was measured in accordance with the implication and aggregation of the fuzzy output set. The center of gravity (CoG) algorithm was utilized to obtain an efficient control signal [29]. The inputs and outputs of FLC qualitative relation were illustrated by designing fuzzy rules sets.…”

Sliding Mode Speed and Position Control of Induction Motor Drive in Cascade Connection

“…where ε me is positive control parameter to be chosen and column vector (20) In this case, the control structure defines not the transistor control signals directly, but the duty cycle functions for each phase (relation of the switching-on time to the whole sampling period). Specific form of the Eq.…”

“…The second group consists of the methods with time-varying switching lines. They have been applied mainly in the position control [20], but also for the speed control [21].…”

Unified approach to the sliding-mode control and state estimation – application to the induction motor drive

“…However, this control method has been applied with the timevarying switching line in the position control of the induction motor drive [14].…”

“…One of the most investigated methods is changing the position of the switching surface (or line) in time, changing the parallel position or the angle. This method was applied in the position control of the IM in [14]. The time-varying switching surface was used for the sliding mode linear feedback control with switched gains.…”